#include <stdio.h>

int main(){

//修改从issue-1合并到master解决冲突，保留issue-1的结果
    printf("hello world\n");
    printf("hello world\n");
    printf("hello world\n");
    printf("hello world\n");

    printf("goodbye world\n");
    printf("goodbye world\n");

    return 0;
}
